I think this event will arrive somewhere in November when/just before the next Zone DLC drops.
With this I'm also seeing the Sovngarde crate season dropping.
New bundle:
This was datamined with the most recent patch and goes by the name: Bundle: Lost Treasures of Skyrim.
I have a theory... We can see a Vale Deer, the new House NPC, possibly a new tattoo/skin, but most importantly, the Antiquarian Alpine Gallery in the background. (The house could mean nothing)
However, I'm begging Zenimax. Please give this to us as some type of gift like what you did with the Elsweyr event. I would love to have this home. It's so peaceful, and it's all I've wanted since I started playing ESO. A nice cosy house by a lovely river.
Motifs:
This is one we already have available in game to preview. and my god does it look damn amazing.
Housecarl:
If you guys find anything else i'll update it. Just post it in comments